Move patches to app/patches

This should make the patches in line with the Flickwerk conventions.

app/patches/controllers/solidus_volume_pricing/spree_admin_variants_controller_patch.rb

@@ -0,0 +1,38 @@
+# frozen_string_literal: true
+
+module SolidusVolumePricing
+  module SpreeAdminVariantsControllerPatch
+    def edit
+      @variant.volume_prices.build if @variant.volume_prices.empty?
+      super
+    end
+
+    def volume_prices
+      @product = @variant.product
+      @variant.volume_prices.build if @variant.volume_prices.empty?
+    end
+
+    private
+
+    # this loads the variant for the master variant volume price editing
+    def load_resource_instance
+      parent
+
+      if new_actions.include?(params[:action].to_sym)
+        build_resource
+      elsif params[:id]
+        ::Spree::Variant.find(params[:id])
+      end
+    end
+
+    def location_after_save
+      if @product.master.id == @variant.id && params[:variant].key?(:volume_prices_attributes)
+        return volume_prices_admin_product_variant_url(@product, @variant)
+      end
+
+      super
+    end
+
+    ::Spree::Admin::VariantsController.prepend self
+  end
+end

app/patches/helpers/solidus_volume_pricing/spree_base_helper_patch.rb

@@ -0,0 +1,29 @@
+# frozen_string_literal: true
+
+module SolidusVolumePricing
+  module SpreeBaseHelperPatch
+    def self.prepended(base)
+      base.module_eval do
+        def display_volume_price(variant, quantity = 1, user = nil)
+          price_display(variant, quantity: quantity, user: user).price_string
+        end
+
+        def display_volume_price_earning_percent(variant, quantity = 1, user = nil)
+          price_display(variant, quantity: quantity, user: user).earning_percent_string
+        end
+
+        def display_volume_price_earning_amount(variant, quantity = 1, user = nil)
+          price_display(variant, quantity: quantity, user: user).earning_amount_string
+        end
+
+        private
+
+        def price_display(variant, quantity:, user:)
+          SolidusVolumePricing::PriceDisplay.new(variant, quantity: quantity, user: user)
+        end
+      end
+    end
+
+    ::Spree::BaseHelper.prepend self
+  end
+end

app/patches/models/solidus_volume_pricing/spree_line_item_patch.rb

@@ -0,0 +1,16 @@
+# frozen_string_literal: true
+
+module SolidusVolumePricing
+  module SpreeLineItemPatch
+    def set_pricing_attributes
+      if quantity_changed?
+        options = SolidusVolumePricing::PricingOptions.from_line_item(self)
+        self.money_price = SolidusVolumePricing::Pricer.new(variant).price_for(options)
+      end
+
+      super
+    end
+
+    ::Spree::LineItem.prepend self
+  end
+end

app/patches/models/solidus_volume_pricing/spree_variant_patch.rb

@@ -0,0 +1,21 @@
+# frozen_string_literal: true
+
+module SolidusVolumePricing
+  module SpreeVariantPatch
+    def self.prepended(base)
+      base.class_eval do
+        has_and_belongs_to_many :volume_price_models
+        has_many :volume_prices, -> { order(position: :asc) }, dependent: :destroy
+        has_many :model_volume_prices, -> {
+          order(position: :asc)
+        }, class_name: '::Spree::VolumePrice', through: :volume_price_models, source: :volume_prices
+        accepts_nested_attributes_for :volume_prices, allow_destroy: true,
+          reject_if: proc { |volume_price|
+                        volume_price[:amount].blank? && volume_price[:range].blank?
+                      }
+      end
+    end
+
+    ::Spree::Variant.prepend self
+  end
+end